ignore model parent specified as url

Author: FynnBe

bioimageio/spec/model/v0_4.py

@@ -870,6 +870,15 @@ def validate_tensor_references_in_outputs(self) -> Self:
     parent: Optional[LinkedModel] = None
     """The model from which this model is derived, e.g. by fine-tuning the weights."""
 
+    @field_validator("parent", mode="before")
+    @classmethod
+    def ignore_url_parent(cls, parent: Any):
+        if isinstance(parent, dict):
+            return None
+
+        else:
+            return parent
+
     run_mode: Optional[RunMode] = None
     """Custom run mode for this model: for more complex prediction procedures like test time
     data augmentation that currently cannot be expressed in the specification.

bioimageio/spec/model/v0_5_converter.py

@@ -32,8 +32,8 @@ def _convert_model_from_v0_4_to_0_5_0(data: RdfContent, context: InternalValidat
     _convert_weights(data)
     _ = data.pop("download_url", None)
 
-    if (p := data.get("parent")) and isinstance(p, dict) and "uri" in p:
-        p["rdf_source"] = p.pop("uri")
+    if isinstance(data.get("parent"), dict):
+        _ = data.pop("parent")
 
     data["format_version"] = "0.5.0"